<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>产品展示 - 科技产品中心</title>
    <style>
        /* 基础样式重置 [2]() */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Arial, sans-serif;
        }
 
        /* 头部样式 [13]() */
        header {
            background: #2c3e50;
            color: white;
            padding: 20px;
            text-align: center;
        }
 
        /* 导航菜单 [11]() */
        nav {
            background: #34495e;
            padding: 15px;
        }
        nav ul {
            list-style: none;
            display: flex;
            justify-content: center;
            gap: 30px;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: bold;
        }
 
        /* 产品展示区 [1]() */
        .products {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            padding: 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
 
        .product-card {
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 15px;
            transition: transform 0.3s;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
 
        .product-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 4px;
        }
 
        /* 视频展示区 [3]() */
        .video-section {
            background: #f8f9fa;
            padding: 40px 20px;
            text-align: center;
        }
        video {
            max-width: 800px;
            width: 100%;
            margin: 20px auto;
            border-radius: 8px;
        }
 
        /* 响应式设计 [2]() */
        @media (max-width: 768px) {
            nav ul {
                flex-direction: column;
                text-align: center;
            }
        }
    </style>
</head>
<body>
    <header>
        <h1>科技产品展示中心</h1>
        <p>探索前沿科技产品</p>
    </header>
 
    <nav>
        <ul>
            <li><a href="#products">产品展示</a></li>
            <li><a href="#video">宣传视频</a></li>
            <li><a href="#contact">联系我们</a></li>
        </ul>
    </nav>
 
    <main>
        <section class="products" id="products">
            <article class="product-card">
                <img src="https://img0.baidu.com/it/u=1954222638,3108421318&fm=253&fmt=auto&app=138&f=JPEG?w=889&h=500"  alt="智能手表" class="product-img">
                <h2>智能手表 Pro X</h2>
                <p>▶ 心率监测 | 50米防水 | 30天续航</p>
                <p>采用最新生物传感技术，支持运动模式识别...</p>
            </article>
 
            <article class="product-card">
                <img src="https://img1.baidu.com/it/u=865685838,3121363804&fm=253&fmt=auto&app=138&f=JPEG?w=800&h=800"  alt="无线耳机" class="product-img">
                <h2>降噪耳机 Air 3</h2>
                <p>▶ 主动降噪 | 空间音频 | 30小时续航</p>
                <p>智能环境音调节，Hi-Res无损音质...</p>
            </article>
        </section>
 
        <section class="video-section" id="video">
            <h2>产品宣传视频</h2>
            <video controls poster="video-poster.jpg"> 
                <source src="https://baikevideo.cdn.bcebos.com/media/mda-OOdLT0kPaBN7yOxV/6197d9426b3d898a5a4f9e07dbfad180.mp4"  type="video/mp4">
                <source src="product-video.webm"  type="video/webm">
                您的浏览器不支持视频播放 
            </video>
        </section>
    </main>
 
    <footer style="background: #2c3e50; color: white; text-align: center; padding: 20px;">
        <p>© 2025 科技产品中心 | 联系我们: contact@techdemo.com</p> 
    </footer>
</body>
</html>